What are the reasons for the problems of nickel plating?

We all know that in order to make full use of super electroless nickel plating, we must not only pass the product quality certification, but also pay special attention to the related matters of electroless nickel plating products. Then we know why there are problems with electroless nickel plating. Here are our professionals For your detailed introduction, I hope to help you!

1. Improper heat treatment process

During the machining process, anti-rust grease, cutting fluid, machine oil, lubricating grease, grinding fluid, mold release agent, etc. adhering to the surface of the parts are mixed with dust and grinding dust to form thick dirt. To remove the above-mentioned dirt, the oil and rust after quenching are difficult to remove, and sintered into stubborn solid oil. During electroplating, air bubbles adhere to it to form gas-retaining pinholes.

2, poor pretreatment before electroplating

The surface of the workpiece after heat treatment will inevitably adhere to a layer of oil stains. When the dust falls on the surface and mixes with the grease, it is difficult to clean for a long time, so that the surface of the workpiece forms insignificant small oil spots, and the bubbles remain on the surface to form pinholes during electroplating. In addition , When quenching with a mesh belt resistance furnace, the oil stains on the surface of the workpiece are mixed with dust and other impurity particles and sintered into stubborn solid oil stains. When the nitrate is tempered, the oil stains and nitrates on the surface form stubborn thermal polymers. During the electroplating process It is difficult to completely remove the above-mentioned dirt in the air, and hydrogen bubbles are easy to adhere to the dirt. In order to discharge, the coating will produce pinholes and pitting, and as the bubbles gradually grow, the coating will automatically rupture, resulting in peeling.